The Online New York Naturalization Records Guide has two pages:
New York State Naturalization Records (this page) and New York City Naturalization Records (next page)
Online New York State Naturalization Indexes and Records
Note that the New York City listings may also include some counties ouside of NYC.
- Albany County Naturalizations 1821-1991
- Cayuga County Naturalization Records Index 1799-1952 PDF file
- Clinton County Naturalization Records Index 1865-1906
- Delaware County Naturalization Records
- Dutchess County, New York Naturalization Records 1932-1989 (at Ancestry/requires payment)
- Erie County (Buffalo) and Monroe County (Rochester)...
- Western District of New York Index to Naturalization Petitions, U.S. District Court, 1907-1966 at Fold3 (formerly Footnote)
- Essex County Naturalization Records Index 1836-1906
- Genesee County Naturalization Records Indexes
- Livingston County Historian Records Index includes naturalization or citizenship registers, 1821-1954
- Long Island: see the Eastern District indexes listed below
- Madison County Naturalization Records 1819-1953
- Monroe County (Rochester): see the Erie County section above
- Nassau County Naturalization Project 1899-1986
- Nassau County: also see the Eastern District of New York in the New York City section listed next
- New York City...
- See: Online New York City Naturalization Records and Indexes (for Bronx, Brooklyn, Manhattan, Queens and Staten Island) also includes some indexes for Columbia, Dutchess, Greene, Nassau, Orange, Putnam, Rockland, Suffolk, Sullivan, Ulster and Westchester Counties
- Ontario County Naturalizations 1803-1956
- Rensselaer County Naturalization Records (partial index)
- Rockland County Naturalization Database 1812-1996
- Suffolk County Naturalization Index 1853-1990
- Suffolk County: also see the Eastern District of New York in the NYC section above
- Ulster County Naturalization Record Collection Index Search c.1800-1992
- Warren County...
- Westchester County Archives Naturalization Records Index 1808-1928 (1929-1955 is being worked on)
- Yates County Naturalization Index
- Misc New York Naturalization Indexes includes...
- Western District Federal Court Naturalization Index: for Allegany, Cattaraugus, Chautauqua, Chemung, Erie, Genesee, Livingston, Monroe, Niagara, Ontario, Orleans, Schuyler, Seneca, Stuben, Wayne, Wyoming and Yates Counties; covers 1903-1966 for petitions; also indexes other naturalization documents
- United States Circuit Court for the Southern District of New York Naturalizations Index 1846-1876 and 1906-1911
- The New York Military Naturalization Project (naturalizations of military personnel for both World Wars & the Korean War)
Other New York Genealogy Resources...
- For Help in Researching New York Naturalization Records Offline See...